Colorado massacre could have been worse

(CBS News) AURORA, Colo. -- The largest mass shooting in U.S. history might have been much worse, had the alleged assailant's gun not jammed, according to reports.

James Holmes was due to make his first court appearance Monday since allegedly killing 12 people and wounding dozens, nine critically, during a midnight screening on the opening night of "The Dark Knight Rises" Friday in the Denver suburb of Aurora, Colo.

Holmes is accused of entering the theatre with three guns, including a semi-automatic assault rifle with an extended magazine.

When that gun jammed, he was forced to use a pistol, potentially saving lives, the reports say.

Read more. (CBS News)